Pacifica V6-3.8L VIN L (2005)
SHIFT SCHEDULES
As mentioned earlier, the PCM has programming that allows it to select a variety of shift schedules. Shift schedule selection is dependent on the
following:
-
Shift lever position
-
Throttle position
-
Engine load
-
Fluid temperature
-
Software level
As driving conditions change, the PCM appropriately adjusts the shift schedule. Refer to the following chart to determine the appropriate operation
expected, depending on driving conditions.
DATA BUS COMMUNICATION RECEIVE - PCM INPUT
The PCM uses the SCI communication bus to preform engine diagnostics and flash operations. The transmission side of the PCM uses the SCI
communication bus to flash new software. However, diagnostics is performed via the vehicles J1850 bus for the transmission side of the PCM.
PCM GROUND
Ground is provided through multiple pins of the PCM connector. Depending on the vehicle there may be as many as two different ground pins. There are
power grounds and sensor grounds.
The power grounds are used to control the ground side relays, solenoids, ignition coil or injectors. The signal ground is used for any input that uses